| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more contributor license |
| * agreements. See the NOTICE file distributed with this work for additional information regarding |
| * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the License. You may obtain a |
| * copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software distributed under the License |
| * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express |
| * or implied. See the License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| |
| package org.apache.geode.cache.client.internal; |
| |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.net.Socket; |
| import java.net.SocketException; |
| import java.nio.ByteBuffer; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import org.apache.logging.log4j.Logger; |
| |
| import org.apache.geode.cache.client.internal.ServerDenyList.FailureTracker; |
| import org.apache.geode.cache.client.internal.pooling.ConnectionDestroyedException; |
| import org.apache.geode.distributed.internal.ServerLocation; |
| import org.apache.geode.internal.cache.tier.sockets.ServerQueueStatus; |
| import org.apache.geode.logging.internal.log4j.api.LogService; |
| |
| |
| /** |
| * A wrapper that holds a client to server connection and a server to client connection. |
| * |
| * The clientToServerConnection should not be used outside of this class. |
| * |
| */ |
| public class QueueConnectionImpl implements Connection { |
| private static final Logger logger = LogService.getLogger(); |
| |
| private final AtomicReference<Connection> clientToServerConn = new AtomicReference<>(); |
| private final Endpoint endpoint; |
| private volatile ClientUpdater updater; |
| private QueueManagerImpl manager; |
| private final AtomicBoolean sentClientReady = new AtomicBoolean(); |
| private FailureTracker failureTracker; |
| |
| public QueueConnectionImpl(QueueManagerImpl manager, Connection clientToServer, |
| ClientUpdater updater, FailureTracker failureTracker) { |
| this.manager = manager; |
| this.clientToServerConn.set(clientToServer); |
| this.endpoint = clientToServer.getEndpoint(); |
| this.updater = updater; |
| this.failureTracker = failureTracker; |
| } |
| |
| @Override |
| public void close(boolean keepAlive) throws Exception { |
| throw new UnsupportedOperationException( |
| "Subscription connections should only be closed by subscription manager"); |
| } |
| |
| @Override |
| public void emergencyClose() { |
| Connection conn = clientToServerConn.getAndSet(null); |
| if (conn != null) { |
| conn.emergencyClose(); |
| } |
| } |
| |
| public void internalClose(boolean keepAlive) throws Exception { |
| try { |
| getConnection().close(keepAlive); |
| } finally { |
| if (updater != null) { |
| updater.close(); |
| } |
| } |
| } |
| |
| @Override |
| public void destroy() { |
| Connection conn = this.clientToServerConn.get(); |
| if (conn != null) { |
| manager.connectionCrashed(conn); |
| } // else someone else destroyed it |
| } |
| |
| public void internalDestroy() { |
| Connection currentConn = this.clientToServerConn.get(); |
| if (currentConn != null) { |
| if (!this.clientToServerConn.compareAndSet(currentConn, null)) { |
| // someone else did (or is doing) the internalDestroy so return |
| return; |
| } |
| try { |
| currentConn.destroy(); |
| } catch (Exception e) { |
| if (logger.isDebugEnabled()) { |
| logger.debug("SubscriptionConnectionImpl - error destroying client to server connection", |
| e); |
| } |
| } |
| } |
| |
| ClientUpdater currentUpdater = updater; |
| if (currentUpdater != null) { |
| try { |
| currentUpdater.close(); |
| } catch (Exception e) { |
| if (logger.isDebugEnabled()) { |
| logger.debug("SubscriptionConnectionImpl - error destroying client updater", e); |
| } |
| } |
| } |
| updater = null; |
| } |
| |
| /** |
| * test hook |
| */ |
| public ClientUpdater getUpdater() { |
| return this.updater; |
| } |
| |
| @Override |
| public boolean isDestroyed() { |
| return clientToServerConn.get() == null; |
| } |
| |
| @Override |
| public ByteBuffer getCommBuffer() throws SocketException { |
| return getConnection().getCommBuffer(); |
| } |
| |
| @Override |
| public Endpoint getEndpoint() { |
| return this.endpoint; |
| } |
| |
| @Override |
| public ServerQueueStatus getQueueStatus() { |
| return getConnection().getQueueStatus(); |
| } |
| |
| @Override |
| public ServerLocation getServer() { |
| return getEndpoint().getLocation(); |
| } |
| |
| @Override |
| public Socket getSocket() { |
| return getConnection().getSocket(); |
| } |
| |
| @Override |
| public OutputStream getOutputStream() { |
| return getConnection().getOutputStream(); |
| } |
| |
| @Override |
| public InputStream getInputStream() { |
| return getConnection().getInputStream(); |
| } |
| |
| @Override |
| public ConnectionStats getStats() { |
| return getEndpoint().getStats(); |
| } |
| |
| @Override |
| public Object execute(Op op) throws Exception { |
| return getConnection().execute(op); |
| } |
| |
| public Connection getConnection() { |
| Connection result = this.clientToServerConn.get(); |
| if (result == null) { |
| throw new ConnectionDestroyedException(); |
| } |
| return result; |
| } |
| |
| @Override |
| public Connection getWrappedConnection() { |
| return getConnection(); |
| } |
| |
| FailureTracker getFailureTracker() { |
| return failureTracker; |
| } |
| |
| /** |
| * Indicate that we have, or are about to send the client create message on this connection. |
| * |
| * @return true if we have not yet sent client ready. |
| */ |
| boolean sendClientReady() { |
| return sentClientReady.compareAndSet(false, true); |
| } |
| |
| @Override |
| public String toString() { |
| Connection result = this.clientToServerConn.get(); |
| if (result != null) { |
| return result.toString(); |
| } else { |
| return "SubscriptionConnectionImpl[" + getServer() + ":closed]"; |
| } |
| } |
| |
| public static void loadEmergencyClasses() { |
| ConnectionImpl.loadEmergencyClasses(); |
| } |
| |
| @Override |
| public short getWanSiteVersion() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public int getDistributedSystemId() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void setWanSiteVersion(short wanSiteVersion) { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public void setConnectionID(long id) { |
| this.clientToServerConn.get().setConnectionID(id); |
| } |
| |
| @Override |
| public long getConnectionID() { |
| return this.clientToServerConn.get().getConnectionID(); |
| } |
| } |